PTM02- Solutions& Heat Flashcards
(25 cards)
What does dissolving mean?
Forming a solution by mixing two or more materials
Mixing materials together does NOT always make a solution!!
What is a solution?
A homogeneous mixture
What makes something dissolve or not dissolve?!
Attraction!!
What is the first step of sugar dissolving in water?
A lump of sugar is dropped into the water
What is the second step of sugar dissolving in water?
Sugar molecules begin to break off from the lump
What is the third step of sugar dissolving in water?
More and more sugar molecules move away and randomly bounce around
What is the final step of sugar dissolving in water?
Eventually, all of the sugar molecules becomes evenly distributed throughout the water
What does solvent mean?
The substance that dissolves a solute to form a solution.
There is usually MORE solvent then solute in a solution.
e.x- the water is a solvent in a sugar-water solution
What is solute?
The substance that dissolves in a solvent to form a solution
e.x- the sugar is a solute in a sugar-water solution
What does soluble mean?
Able to be dissolved in a particular solvent
sugar is soluble in water
What does insoluble mean?
NOT able to be dissolved in a particular solvent
Look at the attraction among the particles to find out if something is soluble or insoluble
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What is the term called when liquid changes into gas?
Evaporation
What is the term called when has changes into liquid?
Condensation
What is the term called when solid directly changes to gas?
Sublimation
What is the term called when gas directly changes to solid?
Sublimation
What is it called when liquid changes to solid?
Solidification (freezing)
What is it called when solid changes to liquid?
Fusion (melting)
What does dilute mean?
A solution that contains relatively little solute
What does concentrated mean?
A solution that contains a lot if solute for the amount of solvent
What is a saturated solution?
A solution in which no more solute will dissolve at a particular temperature
What is a unsaturated solution?
A solution in which more of the solute could dissolve at the same temperature
What is a supersaturated solution?
A solution that contains more solute then would normally dissolve at certain temperature
What is solubility?
The limit to how concentrated a solution can become. The mass of a solute that can dissolve in a given amount of solvent to form a saturated solution at a given temperature
